166 
MICROLEPIDOPTERA OE NEW GUINEA 
white, glossy, base narrowly suffused with pale orange-ochreous, base of 
costal edge with a short black streak; costa from before middle to apex 
with a moderate black streak, gradually narrowed anteriorly, and con- 
tinued along edge of wing as far as 1 / 4 , somewhat dilated towards middle, 
and marked with four rounded white dots; these dots become narrower 
towards apex, ultimate dot forming a small vertical streak before apex ; 
a moderate black streak along termcn to tornus, preceded by another, 
strongly sinuate streak, running from middle of costal streak to tornus; 
an irregularly ovate spot of ground colour between these streaks, faintly 
suffused with pale yellow. Cilia blackish with white base (damaged). 
Hind wing dark grey; cilia white, with a narrow grey antemcdian line. 
Fore wing below blackish with white central half, hind wing below dark 
grey. 
Ostium small, limen narrow, simple, slightly curved in middle. Colli- 
culum moderate, weak. Ductus bursae rather short, no cestum. Bursa 
copulatrix elongate, signum very small: a short hook upon an ovate basal 
plate (Slide No. 396 D, allotype). 
Sigi Camp, 1500 m, February 22, 1939. One specimen. Durrant records 
one female specimen of G. sibyllina from Snow Mountains, Utakwa River, 
4000 — 6000 feet, February 1, 1913 (Brit. O.U.& WOLL, Exp. vol. 1, p. 154, 
1915); by all probability it concerns a Chionothremma species. 
Chresmarcha enaemargyrea spec. nov. (fig. 198) 
£i ’aifiog — bloody, agyvQF.og = silvery 
$ 27 mm. Head, palpus fuscous-black (damaged; palpi missing). Thorax 
fuscous. Abdomen fuscous-black, becoming paler towards base, towards 
apex with faint bluish-purple gloss. Legs and venter dark fuscous. Fore 
wing broad, dilated, costa strongly arched at base, curved posteriorly, 
apex pointed, projecting, slightly falcate, termen being deeply sinuate 
above, prominent and broadly rounded beneath, vertical. A large semi- 
circular well-defined snow-white glossy patch with base occupying almost 
entire dorsum, edged on base of dorsum, on base of wing (here more 
broadly), and along anterior half of costa by a black streak; posterior edge 
of patch with a small triangular projection in middle, and two minute 
projections: at x / 4 and 3 / 4 respectively; apical third of wing deep orange- 
fulvous, separated from white patch by a rather broad black fascia, 
running from middle of costa to dorsum before tornus, moderately dilated 
on costa and dorsum, with posterior edge irregularly suffused; a narrow 
black marginal line along termen, sending off small pointed streaks on 
veins, these streaks becoming shorter towards tornus; spots of shining 
pale blue or greenish-metallic scales, round or ovate, arranged as follows: 
closely set in a series along anterior half of costa, from well beyond base 
to before middle, thence curved to tornus, forming a broad furcation on 
lower half of wing ; anterior arni of this furcation interrupted above, below 
forming an almost continuous curved fascia to above dorsum before 
